Physical Properties of Thermally Crosslinked Fluorinated Polyimide and Its Application to a Liquid Crystal Alignment Layer
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ahn, Jong-Soo | - |
dc.contributor.author | Park, Su Hong | - |
dc.contributor.author | Kwon, Na Yeon | - |
dc.contributor.author | Cho, Min Ju | - |
dc.contributor.author | Paek, Sang-Hyon | - |
dc.contributor.author | Choi, Dong Hoon | - |
dc.date.accessioned | 2022-02-16T06:41:48Z | - |
dc.date.available | 2022-02-16T06:41:48Z | - |
dc.date.created | 2022-01-19 | - |
dc.date.issued | 2021-11 | - |
dc.identifier.issn | 2073-4360 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/135950 | - |
dc.description.abstract | This study demonstrated the use of a thermally crosslinked polyimide (PI) for the liquid crystal (LC) alignment layer of an LC display (LCD) cell. Polyamic acid was prepared using 4,4 & PRIME;-oxydianiline (ODA) and 4,4 & PRIME;-(hexafluoroisopropylidene) diphthalic anhydride (6FDA). The 6FDA-ODA-based polyimide (PI) prepared by the thermal cyclic dehydration of the polyamic acid (PAA) was soluble in various polar solvents. After forming a thin film by mixing trifunctional epoxide [4-(oxiran-2-ylmethoxy)-N,N-bis(oxiran-2-ylmethyl)aniline] with the 6FDA-ODA-based PAA, it was confirmed that thermal curing at -110 & DEG;C caused an epoxy ring opening reaction, which could result in the formation of a networked polyimide not soluble in tetrahydrofuran. The crosslinked PI film showed a higher rigidity than the neat PI films, as measured by the elastic modulus. Furthermore, based on a dynamic mechanical analysis of the neat PI and crosslinked PI films, the glass transition temperatures (T(g)s) were 217 and 339 & DEG;C, respectively, which provided further evidence of the formation of crosslinking by the addition of the epoxy reagent. After mechanical rubbing using these two PI films, an LC cell was fabricated using an anisotropic PI film as an LC alignment film. LC cells with crosslinked PI layers showed a high voltage holding ratio and low residual direct current voltage. This suggests that the crosslinked PI has good potential for use as an LC alignment layer material in advanced LCD technologies that require high performance and reliability. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | MDPI | - |
dc.subject | VOLTAGE HOLDING RATIO | - |
dc.subject | SOLUBLE POLYIMIDES | - |
dc.subject | MOLECULAR-ORIENTATION | - |
dc.subject | AROMATIC POLYIMIDES | - |
dc.title | Physical Properties of Thermally Crosslinked Fluorinated Polyimide and Its Application to a Liquid Crystal Alignment Layer | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Choi, Dong Hoon | - |
dc.identifier.doi | 10.3390/polym13223903 | - |
dc.identifier.scopusid | 2-s2.0-85119251946 | - |
dc.identifier.wosid | 000724615100001 | - |
dc.identifier.bibliographicCitation | POLYMERS, v.13, no.22 | - |
dc.relation.isPartOf | POLYMERS | - |
dc.citation.title | POLYMERS | - |
dc.citation.volume | 13 | - |
dc.citation.number | 22 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Polymer Science | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.subject.keywordPlus | AROMATIC POLYIMIDES | - |
dc.subject.keywordPlus | MOLECULAR-ORIENTATION | - |
dc.subject.keywordPlus | SOLUBLE POLYIMIDES | - |
dc.subject.keywordPlus | VOLTAGE HOLDING RATIO | - |
dc.subject.keywordAuthor | crosslinking | - |
dc.subject.keywordAuthor | elastic modulus | - |
dc.subject.keywordAuthor | liquid crystal cell | - |
dc.subject.keywordAuthor | polyimide | - |
dc.subject.keywordAuthor | residual direct current voltage | - |
dc.subject.keywordAuthor | voltage holding ratio | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.